HITBOX 250A Aluminum MIG Welder 110V/220V Dual Vol MIG/Lift TIG/Stick 4 in 1 Welding Machine Synergic setting: The wire feed speed and current will be auto fitted by input voltage. Manual setting: The wire feed speed and current can adjust by welding data. Digital Screen:The voltage and current are displayed in the panel Can be used with MIG gun with graphite wire feed tube for aluminum function Up to 250 A output that allows to weld mild steel up to 9/32 in plate. Certificated by ETL: Intelligent protection includes over-voltage, over-current, over-heat protection. 2T/4T Operation (2 steps or 4 steps of welding) and inductance(soft to hard on arc sparking)Compatible with WP-17V 35-50 (not included inside product) Non noise: built with thermal original chip.